Pump



4 sheets-sheet -1 Oct. 7, 1941. R. M. WATSON PUMP Filed Feb. 10, 1940 h- N w 1 b 1 1 Ill l rflkml I I I II I t N E 8 K A W m QM \v w H m o:

I I!!! l/f/ 1/ I (If Ralph MWatson Y I INV NTOR ATTORNEY V Oct. 7, 1941. I R. M. WATSON 2,258,155

PUMP

Filed Feb. 10, 1940 Sheets- Sheet 2 l ENTOR Rmph M. Watson ATTORNEY PUMP Filed Feb. 10, 1940 4 Sheets-Sheet 5 Rmph M. Watson IN ENTOR ATTORNEY PUMP '4 Sheets-Sheet 4 Filed Feb. 10. 1940 Ralph M. Watson IN NTOR ATTORNEY Patented Oct. 7, 1941 UNITED STATES PATENT OFFICE PUMP Ralph M. Watson, Bloomfield, N. 1., assignor to Worthington Pump and Machinery Corporation, Harrison, N. 1., a corporation of Delaware Application February 10,1940, Serial No. 318,217

Claims.

This invention relates to pumps and more particularly to a combined pump and centrifuge for performing the dual functions of pumping a liquid and of separating silt or foreign matter therefrom.

Large quantities of water are used in petroleum refineries and other plants for flushing, cooling, etc. Normal river Water contains appreciable quantities of silt, which settles out not only during the progress of the water through the various apparatus in the plant but, in refineries, also in the separating basins designed to remove oil.

An object of the present invention is to provide a device which will serve as a pump for pumping the water through the apparatus and at the same time bring the silt-laden water efllciently up to such speed that the sediment or silt, under the centrifugal action. will concentrate at the outer periphery of the device, from which the silt or sediment will be discharged through a multiplicity of orifices directed backwardly relative to the direction of rotation and collected in an outer casing from which it is discharged to any desired point.

Another object of the present invention is to provide a combined pump and centrifuge in which the clarified water pames through a series of energy recovering passages from which it is discharged into a stationary diffuser or volute collector passage to the point of use.

With these and other obiectsin view, as may appear from the accompanying specification, the invention consists of various features of constructicn and combination of parts, which will be first described in connection with the accompanying drawings, showing a pump of the preferred form embodying the invention, and the features forming the invention will be specifically pointed out in the claims.

In the drawings:

Figure 1 is a longitudinal section through the improved pump.

Figure 2 is a cross-section on the line 2-2 of Figure 1.

Figure 3 is a vertical cross-section on the line 3-3 of Figure 1.

Figure 4 is a vertical cross-section on the line 4-4 of Figure 1.

Referring more particularly to the improved pump which embodies the centrifuge or centrifugal separator features comprises an outer stationary casing l in which is mounted a rotary assembly 2 having an axial inlet 3 which communicates with the suction or inlet passage 4 of the stationary casing I. I

The rotary assembly 2 includes an outer casing 5 and an inner .casing 6, both of which are rotated by rotation of the shaft I. The shaft 1 may be rotated by any suitable type of prime mover (not shown).

The outer casing 5 and the inner casing or shell 6 of the rotary assembly are spaced to'form substantially circular end spaces or passages 8 and 9 and a circumferential cylindrical passage Ill establishing communication between the end spaces or passages 8 and 9.

The end passage 8, which is at the suction end of the pump, has a plurality of impeller or energy imparting vanes II and I2 therein which pick up the liquid at the suction, impart energy thereto,

and deliver the liquid at or near the periphery of thecircular chamber or p ssage 8 laterally into the cylindrical passage in, causing the liquid to flow longitudinally through the cylindrical passage It into the circular passage 9 at the discharge end of the rotary assembly 2.

The inner casing 6 has a plurality oi substantially straight radial vanes H in circumferentially spaced relation about its periphery which carry the liquid circumferentially or in a rotary manner about the periphery ofthe inner casing 6 at substantially the same rate of speed at which the rotary assembly 2 is rotatlngiand while the 4 liquid is flowing transversally through the passage IO or along the periphery of the inner casing 6. The centrifugal action imparted to the liquid by the vanes H, at the same rotational velocity as the speed of rotation of the inner assembly 2, will cause silt or other foreign matter in the water to concentrate at the outer periphery of the cylindrical surface In and against or adjacent to the inner surface l6 of the outer rotary casing i. The cylindrical side walls ll of the outer rotary casing 5 have a plurality of trough-like elements [8 formed therein in circumferentially spaced sets, staggered longitudinally along its length, as more clearly shown in Figure 3 of the drawings. These trough-like extensions extend tangentially from the inner surface, as clearly shown in Figure 3 of the drawings, and terminate in radial end abutments it. The terminal abutments l9 have removable nozzles 20 carried thereby which open into the space the drawings, 2| between the rotary assembly 2 and the outer casing I so that the silt and foreign matter will be projected into the Outer casing I, from which it may pass through a suitable outlet 22 to any desired point.

The orifices or' nozzles are directed backwardly relative to the direction or rotation of the assembly 2 so that the silt with some water will be discharged counter-currently to the direction of rotation of the assembly 2.

The circular passage 9, which is located at the discharge end of the rotary assembly 2, has a plurality of energy recovering passages therein formed by the energy recovering vanes 23. The outer ends of these vanes 23, like the outer ends of the vanes II, project across the end of the cylindrical conmiunicating passage It so that the energy recovering vanes 23 pick up the water or liquid and together with the enclosing end walls, change its direction of flow from one parallel to the axis of the rotary assembly 2 to one radially of the axis and direct it inwardly towards the axis. These energy recovering vanes 23 recover a large proportion of the energy put into the liquid by the energy imparting vanes H, imparting such energy as a rotating medium to the rotary assembly 2, thereby materially reducing vice and consequently reducing the operating costs of the device.

The'vanes 23 discharge the liquid into a stae tionary diffuser or volute-shaped collector passage 25. The passage 25 is shown as having a plurality of diffusion vanes 26 therein, which curve from the entrance 2! of the passage to the point 28 where the collector passage opens into a true volute 29. The stationary volute 29 has a suitable discharge opening 30, from which the clarified water may pass to the point of use.

By particular reference to Figure 4 of the drawings, it will be noted that there are an unequal number of vanes 23 and 28. This figure of the drawings shows one less diffuser vane 26 than there are energy recovery vanes 23. However, the difierence in the number 01' these vanes need not be limited to this particular arrangement, so long as the numbers of the vanes are so proportioned that at no time will the entrance ends of all of the diifuser vanes 26 coincide or meet the discharge ends of all of the energy recovery vanes 23. This inequality in the number of the vanes in the two sets is provided to prevent the vibration which could be set up if the numbers of the vanes were equal so that their facing .ends would coincide at certain times during the operation of the device. I 4

If it is so desired, an inlet, as shown at 36, for fresh water, to permit flushing of the bearings 31, between the rotary assembly 2 and the stationary casing I, may be provided.

It will be understood that the invention is not to be limited to the specific construction or arrangement of' parts shown, but that they 'may be widely modified within the invention defined by the claims.

What is claimed is:

1. In a pump, a rotary casing having an inlet at one end and a discharge at the other end, a plurality of energy imparting vanes in said casing near said inlet for imparting energy to the fluid pumped, a plurality of energy recovering vanes carried by said casing near said outlet, said casing having a passage therein approximately parallel with the axis of rotation of the casing for receiving fluid from said energy imparting vanes and delivering it to said energy recovering the amount of power necessary for operating the defor imparting I tially from the outer vanes, and a plurality of stationary collecting vanes.

2. In a pump, a rotary casing having an inlet at one end and an outlet at the other end, a plurality of energy imparting vanes in said casing adjacent said inlet and rotatable with the casing for imparting energy to the fluid pumped, a plurality of energy recovering vanes carried by said casing adjacent to said outlet and rotatable with the casing, a transmitting passage between said energy imparting vanes and said energy recovering vanes, a plurality of vanes in said passage for carrying liquid in a rotary manner with the rotation of the casing during passage of the liquid from the energy imparting vanes to the energy 'recovering vanes, a stationary casing about said rotary casing, and velocity head recovering vanes carried by said stationary casing at the discharge of said energy recovering vanes.

3. In a pump, a rotary casing havingv an inlet at one end an an outlet at the other end, a plu- 'rality of energy imparting vanes in said casing adjacent said inlet and rotatable with the casing energy to the fluid pumped, a plurality of energy recovering vanes carried by said casing adjacent to said outlet and rotatable with the casing, a transmitting passage between said energy imparting vanes and said energy .recovering vanes, a plurality of vanes in said passage for carrying liquid in a rotary manner with the rotation of the casing during passage of the liquid from the energy imparting vanes to the energy recovering vanes, said rotary casing provided with a plurality of orifices at spaced points thereabout for discharging material, a stationary casing about said rotatable casing for receiving the foreign material from said orifices, said stationary casing having an outlet, and velocity head recovery vanes carried by said stationary casing at the discharge of said energy recovery vanes, said velocity head recovery vanes being unequal in number to said energy recovery vanes for preventing coincidence of fluid passages and resultant vibration in the pump.

4. In a pump, a rotary casing having an inlet at one end and an outlet at its other end, energy imparting radial vanes adjacent to said inlet for imparting energy to the fluid pumped, energy re-.

covery vanes adjacent to said outlet, said casing. having a straight centrifuge passage therein between said energy imparting vanes and said energy recovery vanes, a plurality of straight radial vanes in said centrifuge passage, said rotary casing having a plurality of tangentially extending trough-like elements thereon extending tangenperiphery of said centrifuge passage, said trough-like elements having orifices at their outer ends for discharging foreign material segregated in said centrifuge passage.

5. In a pump, a rotary casing having an inlet at one end and an outlet at its other end, energy imparting radial vanes adjacent to said inlet for imparting energyto the fluid pumped, energy recovery vanes adjacent to said outlet, said casing having a straight centrifuge passage therein between said energy imparting vanes and said energy recovery vanes, a plurality of straight radial vanes in said centrifuge passage, said rotary casing having a plurality of tangentially extending rough-like elements thereon extending tangentially from the outer periphery of said centrifuge passage, said trough-dike elements having orifices at their outer ends for discharging foreign material segregated in said centrifuge'passage, a stationary foreign material receiving casing'about said rotary casing, and stationary velocity head recovery vanes at the discharge of said energy recovery vanes.

ergy recovery vanes, a plurality of straight radial vanes in said centrifuge passage, said rotary casing having a plurality of tangentially extending trough-like elements thereon extending tangentially from the outer periphery of said centrifuge passage, said trough-like elements having orifices at their outer ends for discharging foreign material segregated in said centrifuge passage, a stationary foreign material receiving casing about said rotary casing, and stationary velocity head recovery vanes at the discharge of said energy recovery vanes, said velocity head recovery vanes being unequal in number to said energy recovery vanes for preventing coincidence of fluid passages and possible resultant vibration in the pump.

'7. In a pump, a rotary casing having an inlet at one end and an outlet at its other end, energy imparting radial vanes adjacent to said inlet for imparting energy to the fluid pumped, energy recovering vanes adjacent to said outlet, said casing having a straight centrifuge passage I therein between said energy imparting vanes and said energy recovering vanes, a plurality of straight radial vanes in said centrifuge passage, a stationary casing surrounding said rotary casing said rotary casing provided with discharge openings opening into said stationary casing, a. discharge volute carried by said stationary casing and open to the outlet end of said rotary casing, said stationary casing and said rotary casing cooperating to provide a volute shaped collector passage between the dischargeof said energy recovering vanes and said volute, and a plurality of stationary diffuser vanes in said volute shaped collector passage.

8. In a pump, a rotary casing having an inlet at one end and an outlet at its other end, energy imparting radial vanes adjacent to said inlet for imparting energy to the fluid pumped, energy recovering vanes adjacent to said outlet, said casing having a straight centrifuge passage therein between said energy imparting vanes and said energy recovering vanes, a plurality of straight radial vanes in said centrifugal passage, a stationary casing surrounding said rotary casing, said rotary casing provided with discharge openings opening into said stationary casing, a

discharge volute carriedby said stationary casing and open to the outlet endof said rotary casing, said stationary casing and said rotary casing cooperating to provide a .volute shaped collector passage between the discharge of said energy recovery vanes and said volute, and a plurality of stationary diffuser vanes in said volute shaped collector passage, the relative number 'of energy recovering vanes and of the stationary diffuser vanes being arranged so that at no time during the operation of the device will the entrance ends of all of the stationary diffuser vanes coincide with or meet the discharge ends of all of the energy recovering vanes.

9. In a pump, a stationary casing, a rotary casing within said stationary casing and having an inlet at one end and a discharge at the other end, a plurality of energy imparting vanes in said casing near said inlet for imparting energy to the fluid pumped, a plurality of energy recovering vanes carried by said rotary casing near its outlet, said casing having a passage therein approximately parallel with the axis of rotation of the casing for receiving fluid from said energy imparting vanes and delivering it to said energy recovering vanes, a plurality of stationary diffusion vanes at the discharge ends of said energy recovering vanes, the number of energy recovering vanes and the number of stationary diifuser vanes being such that at no time during the operation of the device will the entrance ends of all of the diffusion vanes coincide with or meet the discharge ends of all of the energy recovering vanes.

10. In a pump, a stationary casing, a rotary casing within said stationary casing and having an inlet at one end and a discharge at the other end, a plurality of energy imparting vanes in said casing near said inlet for imparting energy to the fluid pumped, a plurality of energy recovering vanes carriedby said rotary casing near its outlet, said casing having a passage therein approximately parallel with the axis of rotation of the casing for receiving fluid from said, energy imparting varies and delivering it to said energy recovering vanes, a plurality of stationary diffusion vanes at the discharge ends of said energy recovering vanes, the number of energy recovering vanes and the number of stationary diffuser vanes being such that at no time during the operation of the device will the entrance ends of all of the diffusion vanes coincide with or meet the discharge ends of all of the energy recovering vanes, and a discharge volute carried by the stationary casing and receiving the fluid pumped from said stationary diffuser vanes.

V RALPH M. WATSON. 

